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MICROWAVE OVEN

SERVICE MANUAL

MODEL : MB-390A

CAUTION

BEFORE SERVICING THE UNIT, READ THE
SAFETY PRECAUTIONS IN THIS MANUAL.

Summary of Contents for MB-390A

Page 1: ...MICROWAVE OVEN SERVICE MANUAL MODEL MB 390A CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL ...

Page 2: ...F 2M218J 2M254J 60 Min 483 W x 285 H x 360 D mm 312 W x 198 H x 316 D mm 13 7 kg approx 15 1 kg approx Microwave Power for Variable Cooking Power level Max 600W 360W Defrost 90W Grill Owner s manual Glass tray Rotating ring Grill rack 1 1 ITEM MODEL Power Requirement Power Output Microwave Frequency Magnetron Timer Outside Dimensions Cavity Dimensions Net Weight Shipping weight Control Complement ...

Page 3: ...nel Safety Door Lock System Turntable Rotating Ring Grill Rack 90 Defrost 360 600 Max 0 1 2 3 4 6 7 8 9 20 40 50 60 30 10 5 0 1 0 2 0 3 0 4 0 5 Mins kg Watt Min 1 2 1 POWER CONTROL KNOB Used in selected the desired power level for cooking 2 TIMER KNOB Used to set the cooking time 3 DOOR OPEN BUTTON Press to open the door ...

Page 4: ...n and stops the timer If cooking is to continue close the door Cooking will be resumed until the full cooking time has elapsed GRILL COOKING 1 Open the oven door place the food on the rack in the oven and close the oven door 2 Set the function 3 Set the timer to the desired cooking time The turntable begins to rotate cooking starts and the lamp is turned on At the end of the cooking time you will ...

Page 5: ...M MICROWAVE RADIATION FIRE ELECTRICAL SHOCK AND HAZARDS WHEN SERVICING IT IS ESSENTIAL THAT ONLY MANUFACTURER S SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SHADED AREAS OF THE SCHEMATIC DIAGRAM NOTICE SINCE THIS IS BASIC SCHEMATIC DIAGRAM THE VALUES OF COMPONENTS AND SOME PARTIAL CONNECTIONS ARE SUBJECT TO CHANGE FOR IMPROVEMENT ...

Page 6: ...ilament through two noise preventing choke coils A high voltage of approximately 2100 volts AC is generated in the secondary of the high voltage transformer which is increased by the action of the diode and charging of the high voltage capacitor The negative DC voltage is then applied to the filament of the magnetron WHEN THE DOOR IS OPENED DURING COOKING Both primary switch and secondary switch o...

Page 7: ... operation of the microwave oven requires that the magnetron be assembled to the waveguide and cavity Never operate the magnetron unless it is properly installed Be sure that the magnetron gasket is properly installed around the dome of the tube whenever installing the magnetron 1 1 CAUTIONS Unlike other appliances the microwave oven is high voltage and high current equipment Though it is free fro...

Page 8: ...lat surface at least 10 cm 4 inches from the wall 7 Place the microwave oven as far away as possible from TV RADIO COMPUTER etc to prevent interference EARTHING INSTRUCTIONS This microwave oven is designed to be used in a fully earthed condition It is imperative therefore to make sure it is properly earthed before servicing WARNING THIS APPLIANCE MUST BE EARTHED IMPORTANT As the colors of the wire...

Page 9: ...DOOR PARTS LATCH BOARD PARTS CONTROL PANEL PARTS INTERIOR PARTS BASE PLATE PARTS OVEN CAVITY PARTS 6 1 EXPLODED VIEW INTRODUCTION ...

Page 10: ...6 2 13581A 14970A 14026A 13552A 13536A 15006A 13213A 13720D 13352A DOOR PARTS ...

Page 11: ...6 3 23572A 249402 26549T 24781T WTP015 249401 969201 CONTROL PANEL PARTS ...

Page 12: ...6 4 33112U 35264A WTT021 WTT021 33550H 35026G 33052M 340511 34960A 34036W 36549S WTP013 33390G 35889A 35300S WNZ015 OVEN CAVITY PARTS ...

Page 13: ...6 5 466003 466001 43501A 43500A 44510A 466002 WSZ085 LATCH BOARD PARTS ...

Page 14: ...6 6 WSZ002 WTT028 WSZ002 WTT028 WSZ062 50FZZA WSZ002 WTT037 50CZZH 56324A 55262A 54810C 56851C 56851D 55900A 56549F 56411A 56201A 56930V 56930G 568771 54974S 56912B 56201B INTERIOR PARTS ...

Page 15: ...6 7 56170D 63302A 63303A WTT021 WSZ002 65006B BASE PLATE PARTS ...

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